Gymnasiarch \Gym*na"si*arch\ (j[i^]m*n[=a]"z[i^]*[aum]rk), n. [L. gymnasiarchus, Gr. gymnasi`archos; gymna`sion + 'a`rchein to govern: cf. F. gymnasiarque.] (Gr. Antiq.) An Athenian officer who superintended the gymnasia, and provided the oil and other necessaries at his own expense. [1913 Webster]